A problem with the air compressor unit
Thread Content
In the oil circuit system of an air compressor unit, there is an accumulator – what is its purpose? What is the function of the high-level oil tank? And when is the emergency oil pump used? I would appreciate your advice, thank you!
Accumulator: Installed to protect components such as the machine’s bearing shells in the event of a sudden power outage; it stores energy within the machine to maintain a certain oil supply pressure. High-level fuel tank: Automatically refills the engine with fuel using pressure differences; I’ve never seen that either. Emergency pump: It’s not clear whether it’s interlocked or not; it generally serves as a backup unit, and it starts automatically when the pump in use trips.
A reservoir is a pressurized elastic bladder for storing oil; it works by storing hydraulic energy in a pressure-resistant container and releasing that energy when needed. The high-position fuel tank ensures a continuous supply of fuel and storage of fuel during the operation of the equipment. In the event of an emergency shutdown or power loss, the pressure difference is used to supply oil to the equipment for a period of time. Ensure lubrication for the rotational inertia force of the equipment. If you have a unit driven by a steam turbine, when the unit shuts down, the high-level oil tank can only supply the amount of oil required for coasting. The internal temperature of the turbine is very high, and it transfers heat to the bearings, which may cause the bearings to burn out. So the emergency oil pump starts to supply oil at this point; of course, the power supply for the emergency oil pump should be a backup power source.
I’ve never seen an air compressor oil system that includes an accumulator, but accumulators, high-level oil tanks, and emergency pumps (powered by backup power sources, EPS, etc.) are all designed to provide a certain amount of lubricating oil for a certain period of time in the event of a failure.
Reply to 3#: Great answer; completely correct
Reply to 3#: Advantage: In addition, the emergency oil pump will also come online to supply oil in the event of a sudden power outage throughout the plant!
The accumulator is installed in the control oil system to prevent a drop in control oil pressure. The emergency oil pump is activated when the main and auxiliary oil pumps lose power; it is not connected to the same power supply as the main and auxiliary pumps. The high-level oil tank ensures a short-term supply of lubricating oil for the compressor when the oil pressure is low and the auxiliary pump has not started.
Personally, I think the answer on the third floor is quite correct :)
The accumulator has been in contact with the emergency pump; the high-level oil tank has not been seen
The accumulator also serves a buffering function, stabilizing pressure.
Simply put, the three of them serve the same purpose, but not exactly the same. The main function of an accumulator is to stabilize oil pressure, and it plays a significant role when the pump is switched. The emergency oil pump usually starts automatically when the main power supply is lost; it supplies lubricating oil at a pressure of around 2 bar to the engine. Since it operates on direct current, it can only function for about half an hour. The high-level oil tank provides lubricating oil for a certain period of time, roughly 5 minutes, when the engine stops due to a power loss and the emergency oil pump has not yet started, thereby preventing dry friction between the bearings and the shaft. Many large engines are equipped with all three of these safety measures, while others have only an accumulator and a high-level oil tank, without an emergency oil pump – it depends on how the manufacturer has designed them